This Servo Saver Spring is an ideal replacement part for your ARRMA vehicleFeatures:Precision manufactured from high quality spring steel - Tuned to provide protection to the servo in your ARRMA vehicle - Extra hard spring specification increases steering response - Designed to be used with high-strength servos - 12mm diameter, 20mm lengthIncludes:Precision manufactured from high quality spring steel - Tuned to provide protection to the servo in your ARRMA vehicle - Extra hard spring specification increases steering response - Designed to be used with high-strength servos - 12mm diameter, 20mm length